Pressure-bar mechanism



W. E. MOORE.

PRESSURE BAR MECHANISIVI.

APPL|cA T|0N FILED APR.23,1919.

mamma July 1920.

` ieiaoie.

WILLIAM-EDG'AR MOORE, OF JANESVLLE, WSCONSIN, ASSIGNOR. T0 GEO. S.

' PARKER ANB'W. F. PALMER, BOTH OF JANESVILLE, VTISCONSIN.

PRESSURE-BAR MECHANISM.

Application filed April 23,

To all whom it may concern.'

Be it known that I, WILLIAM E. MOORE, a citizen of the United-States,and a resident o f Janesville, in the county of Rock and State ofWisconsin, have invented a new and Improved Pressure-Bar Mechanism, ofwhich the following is a full, clear, and exact description.

The invention relates to filling fountain pens having a compressiblebag.

The object of the invention is to provide a new and improved pressurebar mechanism provided with locking means adapted to engage an interiorshoulder in the barrel to normally lock the pressure bar mechanism inposition on the barrel but to allow free functioning of the sameWhenever it is Adesired to lill the fountain pen. Another object is topermit the user to conveniently un lock the pressure bar mechanism forremoval from the barrel Whenever it is desired to do so.

With these and other objects in view, the inventionv consists Aofcertain novel features of construction, as hereinafter shown anddescribed and then specifically pointed out in the claims.

A practical embodiment of the invention is represented inthe'a'ccompanying drawings forming a part of this specification, inwhich similar characters of reference indicate corresponding parts inall the views.

Figure 1 is a side elevation of the improved pressure bar mechanism inposition on the barrel of the fountain pen, parts of the latter beingshown in section;

Fig. 2 is a sectional plan view of the same on the line 2-2 of Fig. 1;and

Fig. 3 is an enlarged cross section of the pressure bar-mechanism on theline 3-3 of Fig. 1.

rllhe barrel 10 of the fountain pen is provided at its forward end withthe usual nozzle 11 adapted to support the pen, and on the inner end ofthe nozzle 11 is attached the open end of an inflatable bag 12eXtendinglengthwise within the barrel 10. Une side of the bag 12 is engaged by apressure bar 15 riveted or otherwise secured to the middle of a Hatspring 16 havin its forward end resting on a shoulder 1 formed on thenozzle 11. The rear end 18 of the flat spring 16 extends through theopen end 19 of the barrel 10 and this opening 19 is somewhat reduced toform with the inte- Patented July 69 1929:

1919". serial No. air/.5113.`

rior of the barrel a shoulder 20, as plainly shown in Fig. 1. The outerend of the dat spring 16 is attached to a button 25 adapted to bepressed by the user of the fountain pen whenever it is desired tocollapse the bag 12, as "indicated in dotted lines in Fig. 1, it beingunderstood that on releasing the button 25 the spring 16 lreturns tonormal position thus allowing the bag 12 to reinflate and draw in theink in` the usual manner.

The pressure bar mechanism, comprising the bar 15, the spring 16 and thebutton 25, is normally held against removal from the barrel 1() and forthis purpose use isy made of a locking member 30 depending tfrom' thebutton 25 and projecting through the opening 19 into the barrel 10. Theinner end of the locking member 30 terminates in an angular lug 31normallyengagin the shoulder.20 thus holding the pressure ar'mechanismnormally locked in position, at the saine time allowing pressing of thebutton 25 for collapsing the bag 1'2, as previously eX- plained.

In practice the locking member 30 forms a continuation of the end 18 ofthe 'spring 16, it being understood that for this the piece of which thespring is made is doubled up to provide a return bend which forms thelocking member 30. The bend of the spring material is fastened in placeby a cross piece 32 (see Fig. 3) extending under the bend and fittingwith its ends into the rim of the button. From the foregoing it will beseen that the pressure bar mechanism is normally held in position in thebarrel 10, but when it is desired to remove the I pressure bar mechanismfrom the barrel it is only necessary for the operator to press thelocking member 30 toward the spring 16 to disengage the lug 31 from theshoulder 2O to allow withdrawal of the pressure bar mechanism from thebarrel 10 by way of thed open end 19. The pressure bar mechanism can bereadily reinserted in the barrel by pressing the locking member 30toward the spring to allow: the lug 31 to pass into and throughk theopenin 19 to theny engage the shoulder 20 on re easing the pressure onthe locking member 30. i

Having thus described my invention, claim as new and desire to secure byLettersvPatentel l 1. A pressure bar mechanism for fountain? pens havina barrel and a compressible filling bag t erein comprising a pressurebar in Contact Withthe said bag, a iat spring carrying the said pressurebar and having inner end of the locking member having anl angularlocking lug normally engaging an annular inner shoulder within thebarrel to hold the pressure bar mechanism against removal.

2. A pressure bar mechanism for fountain pens having a barrel and aeompressible fill-v ing bag therein comprising a pressure bar in contactWith the said bag, a flat spring carrying the said pressure bar andhaving its inner end seated in the barrel and the other end extendingthrough the rear end of the barrel, the outer end of the said spring"having a return bent lockingkmember terminating in an angular shoulderWithin the barrel, and a button attached to the bend on the outer endof, the said spring.

3. ln a fountain pen, a barrel having a rear open end and aninteriorshoulder at this end, a nozzle at the forward end of the barrel, acollapsible bag held-0n the nozzle and extending Within the said barrel,a pressure bar Within the barrel and engaging the said bag, a springcarrying the said pressure bar and extending through ythe open end ofthe barrel, a button on the outer end of the spring,' and a lockingmember depending from the button and extending into the rear end of thebarrel, the said locking member having an angular lug engaging the saidshoulder.

4. lln a fountain pen, 'a pressure device of the" class describedextending rearwardly from the barrel of said pen, said rearwardextension beyond the barrel of said pen havh ing a locking memberextending into and adapted to engage the barrel to normally hold thepressure device against. removal, the locking member being resilient toallow of disengaging it from the barrel to permit Withdrawal of thepressure device from the barrel.

WLLIAM ,EDGAR MOORE.

